The snowmobile has a weight of 250 lb, centered at G1 while the rider has a weight of 150...

The snowmobile has a weight of 250 lb, centered at G1 while the rider has a weight of 150 lb, centered at G2. If h = 3 ft, determine the snowmobile's maximum permissible acceleration a so that its front skid does not lift off the ground. Also, find the traction (horizontal) force and the normal reaction under the rear tracks at A.